| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.lucene.spatial.prefix; |
| |
| import java.io.IOException; |
| |
| import org.apache.lucene.analysis.TokenStream; |
| import org.apache.lucene.analysis.tokenattributes.BytesTermAttribute; |
| import org.apache.lucene.util.BytesRef; |
| import org.apache.lucene.util.BytesRefIterator; |
| |
| /** |
| * A TokenStream used internally by {@link org.apache.lucene.spatial.prefix.PrefixTreeStrategy}. |
| * |
| * @lucene.internal |
| */ |
| public class BytesRefIteratorTokenStream extends TokenStream { |
| |
| public BytesRefIterator getBytesRefIterator() { |
| return bytesIter; |
| } |
| |
| public BytesRefIteratorTokenStream setBytesRefIterator(BytesRefIterator iter) { |
| this.bytesIter = iter; |
| return this; |
| } |
| |
| @Override |
| public void reset() throws IOException { |
| if (bytesIter == null) |
| throw new IllegalStateException("call setBytesRefIterator() before usage"); |
| } |
| |
| @Override |
| public final boolean incrementToken() throws IOException { |
| if (bytesIter == null) |
| throw new IllegalStateException("call setBytesRefIterator() before usage"); |
| |
| // get next |
| BytesRef bytes = bytesIter.next(); |
| if (bytes == null) { |
| return false; |
| } else { |
| clearAttributes(); |
| bytesAtt.setBytesRef(bytes); |
| //note: we don't bother setting posInc or type attributes. There's no point to it. |
| return true; |
| } |
| } |
| |
| //members |
| private final BytesTermAttribute bytesAtt = addAttribute(BytesTermAttribute.class); |
| |
| private BytesRefIterator bytesIter = null; // null means not initialized |
| |
| } |